52 lines
1.5 KiB
PHP
52 lines
1.5 KiB
PHP
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<?php
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/*
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Copyright 2019 whatever127
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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function checkIfUserIsRateLimited($resource, $timeLimit = 10, $currentResLimit = 1) {
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$clientIP = $_SERVER['REMOTE_ADDR'];
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$ipHash = hash('sha256', "ratelimits-$clientIP");
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$info = @file_get_contents('cache/'.$ipHash.'.json');
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$info = json_decode($info, 1);
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if(!isset($info['resource'])) {
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$info['resource'] = $resource;
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}
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if(!isset($info['lastAccess'])) {
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$info['lastAccess'] = 0;
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}
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$lastAccess = $info['lastAccess'];
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$accessedRes = $info['resource'];
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$blockAccessTime = $lastAccess + $timeLimit;
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if($blockAccessTime > microtime(1) && $accessedRes != $resource) {
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return true;
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}
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$info['lastAccess'] = microtime(1);
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$info['resource'] = $resource;
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@file_put_contents('cache/'.$ipHash.'.json', json_encode($info)."\n");
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if($lastAccess + $currentResLimit > microtime(1) && $accessedRes == $resource) {
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return true;
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}
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return false;
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}
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